/// <summary>
/// 从JObject对象解析
/// </summary>
/// <param name="jo"></param>
public override void Parse(JObject jo)
{
base.Parse(jo);
JToken jt;
if (jo.TryGetValue("content", out jt) && jt.Type == JTokenType.Object &&
((JObject)jt).TryGetValue("news_item", out jt) && jt.Type == JTokenType.Array && ((JArray)jt).Count > 0)
{
JArray ja = (JArray)jt;
Content = new MultiMediaArticle[ja.Count];
for (int i = 0; i < ja.Count; i++)
{
Content[i] = new MultiMediaArticle((JObject)ja[i]);
}
}
else
{
Content = null;
}
}
/// <summary>
/// 获取永久图文素材
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="mediaId">图文素材的id</param>
/// <param name="errorMessage">返回获取是否成功</param>
/// <returns>返回图文消息；如果获取失败，返回null。</returns>
public static MultiMediaArticle[] GetNews(string userName, string mediaId, out ErrorMessage errorMessage)
{
byte[] responseData = Get(userName, mediaId);
if (responseData == null || responseData.Length == 0)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "获取永久图文素材失败。");
return(null);
}
string responseContent = HttpHelper.ResponseEncoding.GetString(responseData);
if (ErrorMessage.IsErrorMessage(responseContent))
{
errorMessage = ErrorMessage.Parse(responseContent);
return(null);
}
else
{
JObject jo = JObject.Parse(responseContent);
JToken jt;
if (jo.TryGetValue("news_item", out jt))
{
errorMessage = new ErrorMessage(ErrorMessage.SuccessCode, "获取永久图文素材成功。");
JArray ja = (JArray)jt;
MultiMediaArticle[] articles = new MultiMediaArticle[ja.Count];
for (int i = 0; i < articles.Length; i++)
{
articles[i] = new MultiMediaArticle((JObject)ja[i]);
}
return(articles);
}
else
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "获取永久图文素材失败。");
return(null);
}
}
}
/// <summary>
/// 上传图文消息
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="articles">图文消息</param>
/// <param name="errorMessage">返回上传是否成功</param>
/// <returns>返回上传图文消息的结果；如果上传失败，返回null。</returns>
public static MultiMediaUploadResult Upload(string userName, IEnumerable <MultiMediaArticle> articles, out ErrorMessage errorMessage)
{
if (articles == null)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "图文消息不能为空。");
return(null);
}
AccessToken token = AccessToken.Get(userName);
if (token == null)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "获取许可令牌失败。");
return(null);
}
string url = string.Format(urlForUploadingArticles, token.access_token);
string responseContent;
HttpHelper.Request(url, out responseContent, WebRequestMethods.Http.Post, MultiMediaArticle.ToJson(articles));
return(ParseResult(responseContent, out errorMessage));
}
/// <summary>
/// 新增永久图文素材
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="articles">图文消息</param>
/// <param name="errorMessage">返回新增是否成功</param>
/// <returns>返回图文消息的媒体id；如果失败，返回null。</returns>
public static string Add(string userName, IEnumerable <MultiMediaArticle> articles, out ErrorMessage errorMessage)
{
string responseContent = HttpHelper.RequestResponseContent(urlForAddingNews, userName,
null, httpMethodForEditing, MultiMediaArticle.ToJson(articles));
return(GetMediaId(responseContent, out errorMessage));
}